EL carry forward after 2 years

Sceaniro : An employee gets 2 EL every month starting from 0101.2016 and the leave deduction validity period will be 0101.2016 to 31.12.2017. Its means leave accured in the year 2016 will have validity till 31.12.2017.

The balance EL needs to be get carry forward on 31.12.2017 and not on 31.12.2016.